What is the pH of a bleach solution that has a [OH−]=1.9×10^-5 M?

Answers

Answer 1

To find the pH of a bleach solution, we need to use the relationship between the concentrations of hydronium ions and hydroxide ions in water:

pH + pOH = 14

where pH is the negative logarithm of the hydronium ion concentration [H3O+], and pOH is the negative logarithm of the hydroxide ion concentration [OH-]. Since we are given the concentration of hydroxide ions, we can find pOH:

pOH = -log[OH-]
pOH = -log(1.9×10^-5)
pOH = 4.72

Now we can use the relationship between pH and pOH to find the pH of the bleach solution:

pH + pOH = 14
pH = 14 - pOH
pH = 14 - 4.72
pH = 9.28

Therefore, the pH of the bleach solution is approximately 9.28.

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Mention the most suitable separation technique that may be used to separate the components and explain briefly how separation is achieved under the separation technique. A mixture of sand, table salt and iron fillings

Answers

The most suitable separation technique for this mixture is a combination of magnetic separation and filtration.

How is the mixture separated?

First, a magnet can be used to separate the iron fillings from the sand and salt mixture. This is because iron is magnetic and will be attracted to the magnet, leaving the sand and salt behind.

Next, the sand and salt mixture can be dissolved in water. Since salt is soluble in water but sand is not, the salt will dissolve while the sand remains behind. The mixture can then be filtered to separate the sand from the saltwater solution.

Finally, the saltwater solution can be heated to evaporate the water and obtain the salt as a solid residue.

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It took 4.5 pints of chlorine to purify the water in the holding tank. How many liters of chlorine were needed?
2.215 liters
2.115 liters
1.215 liters
1.115 liters

Answers

Answer:2.115 L

Explanation:

4.5 x .47 = 2.115 L

Final answer:

4.5 pints are approximately equal to 2.129292 liters. The answer closes to the result is 2.215 liters.

Explanation:

This question is concerned with conversion between pints and liters. 1 pint is equal to approximately 0.473176 liters. Therefore, to find out how many liters that 4.5 pints is equal to, we multiply 4.5 by 0.473176.

The calculation is as follows: 4.5 pints * 0.473176 liters/pint = 2.129292 liters

Considering the options that was given, the closest answer is 2.215 liters.

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